Direct-draft regulator for warm-air furnaces



MayZZ, 192s. 1,670,508

R. JUDD ET AL DIRECT DRAFT REGULATOR FOR WARM AIR FURNACES Filed Jan- 24, 1927 2 Sheets$heet 1 Lam Ric/1am Judd frlzesl flay/0r 3%, Ralph 6. M-A/aney 1. my M k r W Qktoznug '5 May 22, 1928.

R. JUDD ET AL DIRECT DRAFT REGULATOR FOR WARM AIR FURNACES Filed Jan. 24, 1927 2 Sheets-Sheet 2 fic/zarcf Ju dd v [meal 72-1 110/" $5 Raw/16. MFA/@276) Zr/W MM,

Patented May 22, 1928.

UNITED STATES v 1,670,508 PArENTjoFFrcE.

RICHARD runmmmnsr TAYLOR, AND RALPH MCNANRY,OF DOWAGIAG, MICHI- GAR, ASSIGNORS TO PREMIER WARM-AIR HEATER COMPANY, OF DOW'AGILG, MICE- IGAN, A CORPORATION OF MICHIGAN.

DIRECT-DRAFT REGULATOR FOR WARLLAIR FURNACES.

Application filed January 24, 1927. Serial: No. 163,219.

This invention relates generally to radiators for warm air furnaces and refers more particularly to direct draft regulators for such radiators. One of the principal objects of the present invention is to provide a direct draft regulator which in the event of an explosion from within the furnace will be free to move to open position within the radiator without hindrance from the operating mechanism of said regulator. Another object is to provide an improved means for mounting the regulator in the furnace radiator so that there will be no possibility of the products. of combustion escaping from the radiator and mixing with the warm air.

Still another object is to provide a direct draft regulator which is automatically operated by the opening and closing of the fuel door of the furnace. 7

With these and other objects in view, the invention resides in certain novel features of construction, combinations and arrangements of parts as will be more fully described and particularly pointed out in the ap ended claims.

n the drawings:

Figure 1 is a cross section of the warm air furnace showing a radiator with our improved draft regulator mounted therein.

Figure 2 is a perspective view-of the radiator with a portion thereof broken away so as to show the application of our draft regulater with relation thereto.

Figure 3 is a diagrammatic view showing the connections of the chain to the furnace door and the regulator arm.

In the drawings wherein like characters of reference denote like parts, the numeral 1 designates a warm air furnace which is provided with a circular radiator2 in the top portion thereof having an annular passage 3 and a cross passage 4 communicatmg therewith at opposite sides thereof. As shown the cross passage 4: is provided with an opening 5 in the bottom wall thereof registering with an opening in the top of the combustion chamber ,6 for allowing the products of combustion to enter the radiator, while an outlet passage 7 leading from the radiator is located directly in line with the cross passage 4.

Suitably mounted within the cross passage 4 between the opening 5 and the annular passage 3 is a direct draft regulator 8 for allow ing the products of combustion to pass directly from the radiator throughthe cross to form upper and lower surfaces of differ ent areas, thereby providing an unbalanced construction. However, to insure the retention of the regulator 1n lts vertical closed position under normal conditions, the lower portion thereof is weighted as at 9.

In order that there will be no possibilit of the products of combustion mixing wit the warm air, we provide the regulator 8 with pivot pins 10 which-are journalled in recessed bosses 11 formed as an integral part of the walls of the cross passage 4. As shown the recesses extend inwardly from the base portions of the bosses so that no communicating passage whatsoever is provided for the escape of the products of combustion through the walls of the cross passage.

It will be apparent that one of the pivot pins 10 must be detachably connected tothe regulator to allow for insertion and removal thereof. We, therefore, provide the regulator at one side thereof with a recessed portion 12 and an integral strap 13 bridging the extreme end portion of said recess. In mounting the regulator the integral pin 10 is first slipped into place and the recess portion 12 is positioned so as to re ister with the recess of the other boss 11, w ereupon a removable pin 14 is inserted in the recess 12 and then into engagement with the boss 11, being held therein by means of frictional engagement with the strap 13. As shown the regulator 8 is adaptedto be controlled by the opening and closing of the furnace door. When the dooris closed, the regulator is also in its closed position compelling the products of combustion to travel through the annular passage 3. However, when the furnace door is opened the regulator is moved to open position, thereby allowing the gases to pass directly to the outlet passage 7.

For operating the regulator, we provide a pusher bar 15 which is pivotally connected at its outer end to the depending lever 16 of a pivot shaft 17 mounted in the outer end.

of the outlet passage 7. As shown the inner end of the pusher bar is provided with an enlarged head portion 18 which is supported upon the base portion of the cross passage 4 in close proximity to the lower portion of the regulator 8 and is entirely free to move within the cross passage. When the pusher bar is mounted within the radiator sufficient clearance should be allowed between the inner free end thereof and the lower portion of the regulator for expansion of the several parts.

As shown the pivot shaft 17 is preferably provided with a portion extending exteriorly of the radiator for allowing a weighted arm 19 to be secured thereto. This arm is normally held in horizontal position by means of a chain 20 connected to the furnace door 21 in any suitable manner so that when the door is opened, the chain will allow the weight to drop and thereby move the pusher bar 15 inwardly for opening the regulator 8.

As will be readily apparent either side of the pivot shaft 17 may be extended exterior of the outlet casing for accommodating the arm 19 as is found most desirable.

It will be seen that we have provided efficient and simple means for automatically operating a direct draft regulator from the fuel door of the furnace, said regulator being non-positively held in closed position, but which is adapted to move to open position independently of its operating means in the event of any blast from an explosive mixture within the furnace.

\Vhile it is believed that from the foregoing description, the nature and advantage of our invention will be readily apparent, we desire to have it understood that we do not limit ourselves to the specific construction herein shown and described and that Such changes may he resorted to when desired as fall within the scope of what is claimed.

IV hat we claim as our invention is:

1. In a warm air furnace, the combination with a radiator, of a draft regulator pivotally mounted therein and provided with a weighted portion below its pivot point and operating means for said regulator so constructed and arranged as to allow the regulator to move to open position independently thereof, the said regulator being adapted to return to its normally closed position because of the weighted lower portion thereof.

2. In a warm air furnace, the combination with a radiator, of a draft regulator pivotally mounted therein and operating means for said regulator including a pusher bar mounted within said radiator and having one end thereof free to slide upon the base portion thereof for operating said regulator.

3. In a warm air furnace. the combination with a radiator. of a draft regulator pivotally mounted therein and operating means for said regulator comprising a pusher bar within said radiator having one end thereof pivotally mounted therein and the other end freely supported upon the base portion of said radiator in close proximity to said regulater.

4. In a warm air furnace, the combination with a radiator, of a draft regulator mounted therein and operating means for said regulator comprising a pusher bar within said radiator having one end thereof pivotally mounted therein, the other end thereof having an enlarged head portion freely supported upon the base portion of said radiator in close proximity to said regulator for operating the same.

5. In a warm air furnace, the combination with a radiator, of a draft regulator pivotally mounted. therein, a pusher bar'for said regulator having one end thereof free to move in said radiator for operating said regulator, a pivot shaft mounted in said radiator and having a depending lever pivotally secured to the other end of said pusher bar, said pivot shaft being provided with a portion extending outside of said radiator and a. chain operated weighted arm secured to said exterior portion for actuating said pusher bar.

6. In a warm air furnace, the combination with a radiator, of a draft regulator pivotally mounted therein and provided with a weighted portion below its pivot point and having its greatest area above the pivot point whereby said regulator is normally retained in its closed position, and operating means for said regulation non-positively engageablc therewith.

In testimony whereof we aflix our signatures.

RICHA RD J U DI ERNEST TAYLOR.- R-ALPH S. MQNANEY.

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